manekinekko

function Foo() {
  this.bar = function() {
    return this;
  }
}

// exemple 1
var foo = new Foo();
console.log(foo); //=> Foo
console.log(foo.bar() instanceof Foo); //=> true

manekinekko

function foo() {
  return this;
}

// invocation en tant que fonction
foo(); //=> this === window

var bar = {
  'foo': foo
};

manekinekko

function foo() {};
foo(); //=> this === window

var bar = function() {};
bar(); //=> this === window

// ou en notation ES6
var bar = () => {};
bar(); //=> this === window

manekinekko

// astuce #1
var args = [].slice.call(arguments, 0);

// astuce #2
[].forEach.call(arguments, ( x => /* expression */ ) );

// astuce #3
const args = Array.from(arguments);

manekinekko

function foo() {
  console.log(arguments.length); //=> 3
  console.log(arguments); //=> [1,2,'bar']
  console.log(arguments[2]); //=> 'bar'
  console.log(arguments.filter); //=> undefined
}

foo(1,2,'bar');

manekinekko

function fonction1() {
  var a = 1;
  
  function fonction2() { /* ... */ }
  
  var b = 2;
  if (a === 1) {
    var c = 3;
  }
}

manekinekko

if (true) {
  var foo = 'bar';
}

console.log(foo); //=> 'bar'

manekinekko

var dire = function(callback) {
  alert(callback());
};

// ou en notation ES2015
const dire = (callback) => alert(callback());

manekinekko

function dire(callback) {
  alert(callback());
}
function executerAuChargement() {
  return dire(() => "Bonjour, JavaScript !");
}
window.onload = executerAuChargement;

manekinekko

function dire(callback) {
  alert(callback());
}
function bonjour() {
  return "Bonjour, JavaScript !";
}
function executerAuChargement() {
  return dire(bonjour);
}
window.onload = executerAuChargement;